The number 47738
47738 is a composite number with 4 divisors. Its prime factorisation is 2 × 23869. Divisors (4): 1, 2, 23869, 47738.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47738: a semiprime: 2 × 23869, the product of two primes.
- 2
47738 is composite. Its prime factorisation is
- 3
The divisors add up to 71610; without 47738 itself that is 23872, so 47738 is deficient (23872 is less than 47738). Euler's totient φ(47738) = 23868 numbers up to 47738 share no factor with it.
- 4
The digits of 47738 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 145 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47738 = 2 \times 23869 \]
47738 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71610 |
| Euler totient φ(n) | 23868 |
| Square | 2278916644 |
| Cube | 108790922751272 |
| Square root | 218.490274 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 145 |
| Scientific notation | 4.7738 × |
47738 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand seven hundred and thirty-eight |
| Binary (base 2) | 1011101001111010 |
| Octal (base 8) | 135172 |
| Hexadecimal (base 16) | BA7A |
| Base 3 | 2102111002 |
| As time | 47738 seconds = 13 h 15 min 38 s |
Is 47738 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47738 ÷ 2 = 23869) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47738 a prime number?
No. 47738 = 2 × 23869, so it is divisible by 2.
What are the factors of 47738?
1, 2, 23869, 47738.
What is 47738 in binary?
1011101001111010 (hexadecimal BA7A, octal 135172).
What is the square root of 47738?
About 218.4903.
Is 47738 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 47738?
47738 is a semiprime: 2 × 23869, the product of two primes.